Have you drive a Cayman and/or 370z? To me the drive is very similar between the two and I couldnt justify the price premium of having to get a Cayman S for the same performance, then adding god knows how many extras to spec it up the same as the 370z. I'd love a Turbo'd Cayman (c500HP) but stock for stock, I think the 370z has the Cayman nailed, especially when you add a new exhaust, intakes and remap and still way cheaper than a Porker
(If money were no objective, I'm sure I'd have a Porker though)